Electromagnet.



PATENTED JAN. 8, 190'7. T. MI WALSH.

ELEGTROMAGNET.

APPLIGATION FILED MAY 14, 1906.

UNITED singes :PATENT orrion.

THOMAS M. WALSH OF ROCHESTER, NEW YORK, ASSIGNOR TO STROU miRC Y CARLSON TELEPHONE MANUFACTURING COMPANY, OF ROCH ESTER, NEW YORK, A CORPORATION OF NEW YORK.

ELECTROMAGNET.

. v No. 840,531.

Specification of Letters Patent.

Application filed May 14, 1906. Serial No. 316,629.

.To a/ZZ whom, it may concern:

Beit known that I, Tnoims M. WALsH, a citizen of the TUnited States, residing at Rochester, in the county oi Monroe and State of N ew lYork, have invented a certain new and useful Improvement in Electromagnets, or which the following is a full, clearfconcise, and exact description, reference being had to the accompanying' drawings, forming a partio of this specification.

My invention relatesAA to electromagncts, and has for its object the provision of an elec* tromagnet which will be durable and of simple construction ,a-ndin which the various t 5 parts maT be easilyv constructed and assembled.

As is well known in the art,f it is a usual practice to make the heads of the electromagnet-spool of a composition or fiber. It

2O is usual, as is Well known in the art, to dispose the wire ends of the coil within these beads, and it has been found that this has given rise to diflicult'ies due to the corrosive substances in the `liber which cause the wire to be eaten ofi", thereby opening the circuit and disabling the apparatus. In order to overcome somewhat this defect, rubber heads have frequently been substituted` for the liber heads; but it has been found that this con- 3o struction is not onliv too expensive for ordinat) use, but that. it is inefficient and unreliable, because the rubber is so readily aliected by heat, this causing the rubber heads to become soft and to expand, thereby-allowing 3 5 the terminals of the coil to become loose and often causing the destruction of the head.

. The object of this invention is to overcome these diihculties and to provide a spoolhead and terminal which is strong and durable and 4o which will in no wa)T aiiect the wire termiuals of the electromagnet-coil.

In general it. may be stated that I provide fiber heads for forming the end supports of the spool and in conjunction therewith a rubber disk in` which the terminals arc disposed. This construction eliminates the difficulties due to the corrosive "substance in the fiber and still retains the strength and dura-bility given to electromagnet-coils by the fiber 5o heads.

M v invention will be more clearl)T understood by reference to the accompanying drawings, in which- Figure 1 is an elevation View ofthe electromagnet of my invention. F ig. 2 is an eleva- 55 tion view with the coil removed. F ig. Sis an end view o1'l the clectromagnet. Fig. i is a view showing one oll the iiber headset' the spool. Fig. 5 is a sectional view on the line 5 5 of Fig. 4. Fig. 6 is a view showing the other fiber head, and Fig. T is a view showing the rubber disk heretofore referred to.

To' a core S are secured the spool-heads 9 and 10. In orderthat the spool-heads maybe mounted upon the core in a durable and secure manner, the core S mav be provided with the knurled portions 11 and 12. The head 9 lis provided with the openings 13 and 14,which serve a purpose, as will be hereinafter described. This construction is clearlvshown in 7o Figs. 4 and 5. Alsodnounted upon said core and in close association with the head 12 is the rubber disk 15, which is provided with the openings 16 and 1T, these openings being of small size and adapted forthe reception of the Wire terminals of the coil C, which is mounted upon the l:ore between the disk 15 and the head 10. The disk 15 is so disposed with rei erence to the head 9 that the openings 16 and 1T will register with the center of the openings 13 and 14, respectively. Mounted upon the head E) are the crimped metal terminals 18 and 19, which are provided with the llugs 20 20 for engagement with the openings 2l 21 in the spool-head 9. These nietal termi'- 85 nals are piaced proximate to the openings 13 1-1, so that the wire terminals ol the coil leading through the openings 1G and 17 may be soldered to the metal terminals lSand 19, re spectivelj', the openings 13 and 14 being of sullicient size, so that the wire ends ofthe coil will not make contact with any part olz the iiber. It is thus seen that the wire termi nais of the coilare mounted in rubber, which, as is well known in the art, is a safe and eiiicient means for supporting electrical conductors. Itis `fuither seen that the spool is rendered durable and of solid cons'truction'on account oiE the employment et the strong fiber heads S1 and 10. The metal terminals vare inl sulated from eachother by the fiber, and the wire tern'iinals are soldered. direc-tlv to thesev crimped met-al terminals, whereby the wire is prevented from in any wav making contact with the iiber. It is thus seen that the difhio 5 culties hereinbefore poin i out are over# come by a simple and eient structure, which does not incur additional expense and 'i OO which may be easily constructed and assemheads for supporting the wire terminals of said Winding, and metal terminals upon the associated head to which may be secured the wire terminals ofv the winding.

'2. In an electromagnet, a core, a Winding upon said core, a head ,atV either end of said core, an annulus of non-.corrosive material associated with one of said heads, said annu lus being provided lWithopenings for the reception of whirling-terminals and clips or metal terminals upon said associated head 'to which lsaid wire terminals may be secured; said Wire terminals passing through openings in said associated head, said openings being of sui'licient vsizeV so that said wire terminals may not engage the said head.

3.'In an electromagnet, a core, a head mounted at each end of said core, a disk associated with one of said heads, a coil mounted between said disk and the other of said heads, said disk being provided with open-l ingsivherein are disposed the terminals ofthe coil,v metal terminals mountedupon the associated head to which said terminals may be secured, said associated hea-d being provided with openings approximate to said-clips and said openings in said disk of suiiicient size whereby said Wire terminals may pass through said openings Without engaging the side of said opening. 4

4. In an electromagnet, the combination with a core and a vWinding thereon, of a head at either end 'of said core,v an annulus associated Wit-l1 one of said heads, said annulus being rovided with openings for the reception of the Wire terminals of said winding, metal terminals mounted upon the said associated head to which may be secured the Wire terminals otsaid winding, said head being provided with openings of sul'licient size s o that said Wire terminals maynotengagesa'id head.

5. In combination, an electromagnet-,corcy a disk on said core, an auxiliary disk on said.

, contact of the wires With the material of 'the core adjacent to the 'first disk and having openings for receiving the terminals of a the holes in the auxiliary disk, terminal clips 7 on the outside of the head adjacent tothe passage-Ways thereto, said holes and passageways serving to lead the terminals of the 'winding to said terminal clips, said large Y openings through the head preventing conf tact of the terminal wires With'the material of thehead. j

7. In combination, a core, awinding thereon, comparatively heavy heads at the ends of the core torconfining the winding, large openings through one of said heads, terminal clips secured Vover said openings to the outsideof t-he head, an auxiliary comparatively thin disk on said coreand associated With said,

terminalhead, there being openings through I saidauxiliary disk smaller than the openings of the head and in register with the center thereof, said holes and openings serving to lead the ends of the Winding to said termina clips, the size and disposition of the openings in the head and auxiliary disk vpreventing disk.

8. In combination, a core, a'comparatively heavy disk secured to said core, openings of large diameter tlnough said heavy'disk, terminals mounted on the outside of said disk loo .over said openings, a` comparatively light disk on said core adjacent to the inner side of theheavy disk, said lighter disk having openlng-s concentric with the larger opelnngs'in the heavy disk but of less diameter whereby 1'05 the ends of a Winding on said core may pass through said openings t-o be secured to said terminal clips but held out of contact with the material of the heavy disk.

In Witness', whereof I hereunto subscribe Asie' my name .this 9th day ofMay, A. 1).1906. 4THOMAS M WALSH.

4Witnesses:

, CHARLES' E. HAGUE,

ALBERT C. BELL.

winding on said core, there being passage- 

